Illuminating cabinet



Dec. 1-932. F. w. BORDEN- ILLUMINATING CABINET Filed July 31, 1928 INVENTOR. FRED n. BORDEN.

ATTORNEY .25 stereoscope.

Patented Dec. 20, 1932 UNITED STATES" rimn w. BURDEN, or sim rnmcrsoo, CALIFORNIA .ILLUMINATING CABINET Application :filed 11115781, 1928. :Serial No. 296,529.

' This invention relates to improvements in illuminating cabinets, particularly as applied to stereoscopes of the: table type. I

An object of my invention is to provide an improved illuminatingcabinet for viewing X-ray films or the like. 7

Another object of my invention is to provide an improved illuminating cabinet which is particularly applicable to stereoscopes wherein the films are viewed in a-horizontal position.

Another object of my inventionis to provide an improved illuminating cabinet for viewing X-ray films wherein is embodied 5 novel means for cooling the interior and particularly the film-supporting surface thereof, whereby the films maybe protected from an excessive amount of heat.

Other objects more or lessapparent will present themselves or will :be specifically pointed out in the description .tofollow.

In the accompanying drawing:

Figure 1 is a cross sectional view ofan illuminating :cabinet as applied to Figure 2 is a sectional view of a .portion ofthe cabinet as indicatedby the line 2.-2 in Figure 1.

Referring tothe drawing, the numeral 1 represents a cabinet on whichstereoscopic or other viewing means may be mounted. The top of the cabinet is covered partlyEby two frosted or other suitably constructed sheets of glass 3, through which light rays from within the cabinettmay proceed outwardly. Electric light globes 4 whichare suitably supported inside reflectors 5, serve as suitable means for sendinglight rays outwardly through the sheets of glass'3 -from within the cabinet. The upper inside part of the cabinetis divided into two light chambers .6 by two slightly-separated vertiealpartitions 7, and'each of the chambers is enclosed at its bottom side by a partition member. 8.

A-.vertical partition19, spaced from the front a tableside of the cabinet and secured to the partition members 8 at its lower edge, provides ;a channel 10 through which quantities of air may proceed upwardly from the lower inside part of thevcabinet. Another vertical partition 9, spaced from the sides of the cabinet andsecuredtothepartitionmembers 8 at its .lower edge provides a channel 10' through which air may proceed upwardly as in channel 10. The partitions 7 and 9 extend from the partition 8 to points beneath the glass sheets 3. Suitably supported in inclined positions insideeach of the chambers '6 and extending from a partition .7 to a side wall of thecabinet are a number of glass sheets 11 which are so separated. one from another Y as to form. anumber of passageways for the movement of. quantities of air.

, The-topmost sheet 11in each chamber extends from the partition 9 .to points adj acentbut separated from the rear wall of the cabinet, while the other of said sheetsin each compartment extend from a tubular box shaped-member 12 secured to the partition 9,

to the-said rear wall of the cabinet. Located 1170 .in partitions 9 at points adj acent the outer ends of the tubular box-shapedmembers 12, are openings '13, which are of suflicient sizeto allow quantities of air from channel 10' to .enterfthe chambers 6 at points between the 15 lower sheet'll-and the sheet immediately be- 'neath the topmost-of the said sheets. The

air so enteging thechambers 6 through'the openings 13 is guided upwardly betweencertain of the sheets 11 tocertain of the openings M located in the rear wall of the cabinet, from 'whencezit passes from the chambers .6. The 1 above described air-cooling apparatus located in the chambers6 serves as ameans forpreventing an excessive amount of heat gen'er- 35 ,ated by the globe 4'from reaching the sheets ofglass3 nponwhich X-ray films or-the like are positioned .for observation purposes. Upon theilighting'of the'electric globe lin.

each.chamber,.,the airaround the samebe m comes heated and passes upwardly beneath the lower of the sheets 11 to certain of the openings 14 from whence it escapes. Because the bottom of each of the chambers 6 is sealed by a partition 8, quantities of cool air are drawn upwardly through the channel 10 and downwardly between the topmost of the sheets 11 and the sheet located directly beneath it, through the box-shaped tubular member 12 and into the lower part of the chamber 6. During the time the air is so circulating through the cabinet, the lowest one of the sheets 11 as well as the sheets above the same, become heated to certain degrees, thereby warming the strata of air located between them. The warmed air located between certain of the sheets proceeds upwardly to the openings 14 from whence it passes from the inside of the cabinet. The upward movement ofthe air between the sheets 11 causes quantities of cooler air to be drawn through.

the openings 13 into the space located between certain of the said sheets, thereby caus ing a circulation of air to be set up for the purpose of maintaining the sheets 1n a cooled condition.

In order to prevent the passage of hght rays through those portions of the glass sheets 3 that are not covered by the X-ray or the like, I have provided a series of ad1ustable curtains within the cabinet which may be so manipulated as to allow the light rays from the globe 47to pass only through those portions of the glass sheets as are coveredby the said films. The mechanism for operating these curtains is indicated by the numeral 15.

' It is apparent that the light cabinet of my invention may be embodied in var1ous forms, the scope of the invention being defined by the following claims.

Having described my invention, what I claim is: I

1. In an illuminating system for stereoscopes and the like comprising a casing hav-' ing openings in its sides, a source of light located in the casing, a film support located at the top of the casing, and a plurality of separated transparent inclined sheets located in the casing between the source of light and the support, the said sheets being so positioned that air from the openings in the caslng may pass between the sheets.

2. In an illuminating system for stereoscopes and the like comprising a casing having openings therein, a transparent support located at the top ofthecasing, a source of light located in the casing, a plurallty of *separated sheets located in the casing between the source of light and the transparent support, means for admitting air to the space located between the sheets, and a partition located adjacent a side of the casing whereby 'an air channel is formed which permits jquanquantities of air to the space located between certain of the sheets, means for causing air to circulate above the inclined sheets, and means for allowing the air circulating above the inclined sheets to proceed to the space in the casing beneath the sheets.

4. An illuminating system for stereoscopes andthe like comprising a light transmitting support, a light source positioned to direct illumination through said support, a

plurality of separated sheets positioned between said light source and said support, means for directing a cooling fluid successively between said sheets and said support and said sheets and said source, and means for supplying a separate current of cooling fluid to the space between said sheets.

5. An illuminating system for stereoscopes and the like comprising a light transmitting support, a light source positioned to direct illumination through said support, a plurality of separated sheets positioned between sa d light source and said support,

means for directing a cooling fluid successively between said sheets and said support, between one of said sheets and the remainder "thereof, and between said sheets and said source, and means for directing a separate quantlty of coollng fiuld between the remalnder of said sheets.

6. An illuminating system for stereoscopes i illumination through said support, a plurality ofseparated sheets positioned between said light source and said support, means for passingair between certain of said sheets, and means for directing a second current of air'between the remainder of said sheets in the opposite direction.

8. An illuminating system for stereoscopes and the like comprising a light transmitting support, a light source positioned to direct illumination through said support, a housing enclosing said light source and having open- 'ings in the walls'thereof at different levels, tities of air toproceed throughthe casing and a sheet of transparent material disposed between said light source and said support and forming a continuous passage between said openings wherethrough cooling air is drawn by the thermo-siphon action.

9. An illuminating system for stereoscopes and the like comprising a housing, a light transmitting support forming one wall of said housing, a light source positioned to direct illumination outward through said support, and a plurality of inclined sheets of transparent material disposed between said source and said support to form a continuous air passage through said housing, said housing being provided with openings at the ends of said passage wherethrough thermo-siphon circulation is induced by heat from said source.

FRED W. BURDEN. 

